Re: [kvm-unit-tests PATCH] Make the powerpc tests compilable with GCC 8

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On 13/06/2018 16:17, Thomas Huth wrote:
> The new GCC 8.1 is optimizing the code with vector instructions.
> However, we have not turned on the vector extension in our kvm-unit-test
> code, so the tests crash when they hit such an instruction. Compile
> the unit tests without vector extensions to avoid this problem.
> 
> Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
> ---
>  powerpc/Makefile.common | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
> index 63dc166..81c5074 100644
> --- a/powerpc/Makefile.common
> +++ b/powerpc/Makefile.common
> @@ -19,7 +19,7 @@ all: directories $(TEST_DIR)/boot_rom.bin $(tests-all)
>  
>  CFLAGS += -std=gnu99
>  CFLAGS += -ffreestanding
> -CFLAGS += -O2
> +CFLAGS += -O2 -msoft-float -mabi=no-altivec -mno-altivec
>  CFLAGS += -I $(SRCDIR)/lib -I $(SRCDIR)/lib/libfdt -I lib
>  CFLAGS += -Wa,-mregnames
>  
> 

Reviewed-by: Laurent Vivier <lvivier@xxxxxxxxxx>




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